Have you been told not to have sex (for a certain duration of time) by a doctor or a nurse?

Yes, after surgery for kidney stones I had a stent implanted in my urethra. They told me no sex until the stent was removed, a period of roughly 10 days.

@Norton

I also had a stent post stone procedure, though no admonition against sexual activity. Being in a mood, when my urologist asked if I had had any problems, I said Not really, but it was hell getting a condom to go over the stent. Seeing his appalled look, I quickly told the doc I was joking.